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Pressure
Unit Name Symbol SI Equivalent 
· atmosphere (metric) 
at  9.80665x104 Pa 
· atmosphere (standard) 
atm  1.01325x105 Pa 
· bar 
bar  1x105 Pa 
· barad 
barad  0.1 Pa 
· barye 
  0.1 Pa 
· centiHg (0°C) 
  1333.22 Pa 
· centimeter of mercury (0°C) 
cmHg (0 °C)  1333.22 Pa 
· centimeter of water (4°C) 
cmH2O  98.0638 Pa 
· dyne per square centimeter 
dyn/cm2  0.1 Pa 
· foot of water (4°C) 
ft H2O  2988.98 Pa 
· gigapascal 
GPa  1x109 Pa 
· hectopascal 
hPa  100 Pa 
· inch of mercury (0°C) 
inHg (0 °C)  3386.38 Pa 
· inch of mercury (15.56°C) 
inHg (15.56 °C)  3377.18 Pa 
· inch of water (15.56°C) 
inH2O (15.56 °C)  248.845 Pa 
· inch of water (4°C) 
inH2O (4 °C)  249.082 Pa 
· kilogram force per square centimeter 
kgf/cm2  9.80665x104 Pa 
· kilogram force per square decimeter 
kgf/dm2  980.665 Pa 
· kilogram force per square meter 
kgf/m2  9.80665 Pa 
· kilogram force per square millimeter 
kgf/mm2  9.80665x106 Pa 
· kilopascal 
kPa  1000 Pa 
· kilopound force per square inch 
kip/in2, ksi, KSI  6.89476x106 Pa 
· megapascal 
MPa  1x106 Pa 
· meter of water (15.56°C) 
mH2O, mCE (15.56 °C)  9797.06 Pa 
· meter of water (4°C) 
mH2O, mCE (4 °C)  9806.38 Pa 
· microbar (barye, barrie) 
µbar  0.1 Pa 
· micron of mercury (millitorr) 
µHg (0 °C)  0.133322 Pa 
· millibar 
mbar  100 Pa 
· millimeter of mercury (0°C) 
mmHg, torr, Torr (0 °C)  133.322 Pa 
· millimeter of water (15.56°C) 
mmH2O, mmCE (15.56 °C)  9.79706 Pa 
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Selecting the Right 3D Printer

Discover how to choose the right 3D printer for your needs and the key performance attributes to consider.

Negotiate Your Salary

Learn the best principles to negotiate the salary you deserve!

Essentials of Manufacturing

Information, coverage of important developments and expert commentary in manufacturing.

Mechanical Engineers Outlook

Guide for those interested in becoming a mechanical engineer. Includes qualifications, pay, and job duties.

more publications